Apparatus and method for presenting and gathering text entries in a pen-based input device

• US 5,881,169 A
• Filed: 09/13/1996
• Issued: 03/09/1999
• Est. Priority Date: 09/13/1996
• Status: Expired due to Term

• Current Assignee: Blackberry Limited
• Original Assignee: Ericsson, Inc. (Telefonaktiebolaget LM Ericsson)
• Inventors: Henry, Raymond Charles Jr.
• Primary Examiner(s): Mancuso, Joseph
• Assistant Examiner(s): Miller, Martin E.
• Application Number:
  US08/714,361
• Time in Patent Office: 907 Days
• Field of Search: 382/187, 382/229, 382/230
• US Class Current: 382/187
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text
• CPC Class Codes: G06F 40/274 Converting codes to words; Guess-ahead of partial word inputs

Abstract

A method and apparatus for presenting and gathering text entries in a pen based input device. The apparatus and method allows for the entry of textual information into a computing device using either handwriting recognition, character selection, or expression selection. Individual entry and selection fields for each of these methods are provided to the user in a coordinated comprehensive method of displaying and gathering the textual information. Handwriting recognition functionality is used to facilitate character recognition. Furthermore, lists of expressions allow the text entry method and apparatus to anticipate the next character or expression to be entered by the user.

Claims

1. A text entry device for presenting and gathering textual information in a computing device, the text entry device comprising:

a pen based entry and display screen coupled to the computing device, the display screen for displaying and gathering textual information;

a database stored within the computing device, the database comprising a list of expressions which are potential entries to the computing device;

a text entry field located on the display screen for displaying text entered into the computing device;

a handwritten character input area located on the display screen for inputting and displaying user-printed characters to be entered into the computing device, the computing device having character recognition capabilities for identifying characters printed in the character input area;

an anticipated character selection field located on the display screen, the anticipated character selection field for displaying a subset of characters likely to be entered into the computing device from among an entirety of characters based on comparison between characters displayed in the text entry field and expressions listed in the database;

wherein, the subset of characters comprising a list of individual characters that may be selected as the next character to be input;

an anticipated expression selection field located on the display screen, the anticipated expression selection field for displaying a plurality of expressions likely to be entered into the computing device based on comparison between characters displayed in the text entry field and expressions listed in the database;

wherein, anticipated expression selection field includes multi word or mnemonic or alphanumeric expressions;

an input processor operably coupled to the display screen and operably coupled to a control processor, the input processor for detecting input information to the display screen in at least the character input area, the anticipated character selection area, and the expression selection area and further, for communicating the detected input information to the control processor; and

a control processor operably coupled to the input processor, the display screen, and the database, the control processor for controlling and coordinating the text entry device.

2. The text entry device as recited in claim 1, wherein the anticipated character selection field is variable in the number of characters displayed.

3. The text entry device as recited in claim 1, wherein the anticipated expression selection field is variable in the length and number of entries.

4. The text entry device as recited in claim 1, wherein the database of expressions comprises an exhaustive list of words.

5. The text entry device as recited in claim 1, wherein the database of expressions comprises a list of expressions which is incrementally created as expressions are entered into the computing device and added to the database.

6. The text entry device as recited in claim 1, wherein the database of expressions comprises a list of expressions associated with a computing applications running on the computing device.

7. The text entry device as recited in claim 1, wherein the database of expressions comprises an exhaustive list of words, a list of expressions associated with computing applications running on the computing device, and the entries to the list further being added as expressions are entered into the computing device.

8. The text entry device as recited in claim 1, wherein the display screen is responsive to pressure for inputting information.

9. The text entry device as recited in claim 1, wherein the display screen is responsive to light for inputting information.

10. An apparatus for presenting and gathering textual information, the apparatus comprising:

a pen based entry and display screen for gathering and displaying textual information;

a database of expressions, the database comprising a list of expressions which are potential entries;

a text entry field located on the display screen for displaying text entered;

a hand written character input area located on the display screen for inputting and displaying user provided characters;

an anticipated character selection field located on the display screen, the anticipated character selection field for displaying a subset of characters likely to be entered from among an entirety of characters based on comparison between characters displayed in the text entry field and expressions listed in the database;

wherein, the subset of characters comprising a list of individual characters that may be selected as the next character to be input;

an anticipated expression selection field located on the display screen, the anticipated expression selection field for displaying a plurality of expressions likely to be entered based on comparison between characters displayed in the text entry field and expressions listed in the database;

wherein, anticipated expression selection field includes multi word or mnemonic or alphanumeric expressions;

an input device for inputting characters into the character input area, selecting characters from the character selection field, and selecting expressions from the expression selection field; and

a control processor operably coupled to the input means, the display screen, and the database, the control processor for controlling and coordinating the text entry device.

11. A method for presenting and gathering textual information in a computing device comprising the steps of:

constructing a database within the computing device, the database comprising a list of expressions which are potential entries to the computing device;

displaying a text entry field located on a display screen for displaying text entered into the computing device;

displaying a character input area located on the display screen for user printed characters to be entered into the computing device, the computing device having character recognition capabilities for identifying characters printed in the character input area;

displaying an anticipated character selection field located on the display screen, the anticipated character selection field for displaying a subset of characters likely to be entered into the computing device from among an entirety of characters based on comparison between characters displayed in the text entry field and expressions listed in the database;

wherein, the subset of characters comprising a list of individual characters that may be selected as the next character to be input;

displaying an anticipated expression selection field located on the display screen, the anticipated expression selection field for displaying a plurality of expressions likely to be entered into the computing device based on comparison between characters displayed in the text entry field and expressions listed in the database;

wherein, anticipated expression selection field includes multi word or mnemonic or alphanumeric expressions;

detecting input to the display screen in at least the character input area, the anticipated character selection area, and the expression selection area of the display screen; and

controlling the operation of the text entry device by a controller coupled to the display screen and the database.